[PATCH v2 0/5] input: pm8941-pwrkey: Add support for reboot reason

[PATCH v2 0/5] input: pm8941-pwrkey: Add support for reboot reason

[Vinod Koul]

To add support for reboot reason there have been some attempts [1], [2]
in past. Based on these discussions we added a new pon driver and made
pwrkey and resin as child nodes to pon.

Since the pwrkey and resin are similar, abstract pwrkey driver
and then add support for resin in the same driver.

Since the patches touch reset and input subsystems, it would be nice if
folks can ACK and we carry thru one subsystem, I would prefer that to be
input, other way would work fine too.

[1]: https://patchwork.kernel.org/patch/9751627/
[2]: https://patchwork.kernel.org/patch/10381801/

Changes in v2:
 - Add Bjorn's ack
 - Fix power binding by removing reg property
 - Use single block for parent check in pm8941-pwrkey as suggested by
   Dimitry

Vinod Koul (5):
  dt-bindings: power: reset: Add qcom pon binding
  power: reset: qcom-pon: Add Qcom PON driver
  dt-bindings: Input: Add additional property to qcom pwrkey
  input: pm8941-pwrkey: Abstract register offsets and event code
  input: pm8941-pwrkey: Add resin entry

 .../bindings/input/qcom,pm8941-pwrkey.txt          |  9 +++
 .../devicetree/bindings/power/reset/qcom,pon.txt   | 45 +++++++++++
 drivers/input/misc/pm8941-pwrkey.c                 | 69 ++++++++++++----
 drivers/power/reset/Kconfig                        |  8 ++
 drivers/power/reset/Makefile                       |  1 +
 drivers/power/reset/qcom-pon.c                     | 91 ++++++++++++++++++++++
 6 files changed, 210 insertions(+), 13 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/power/reset/qcom,pon.txt
 create mode 100644 drivers/power/reset/qcom-pon.c

-- 
2.14.4

[PATCH v2 1/5] dt-bindings: power: reset: Add qcom pon binding

[Vinod Koul]

The Power On driver for Qcom PM 8xxx is a MFD supporting pwrkey and
resin along with the Android reboot-mode.
Add the binding describing this.

Suggested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 .../devicetree/bindings/power/reset/qcom,pon.txt   | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/reset/qcom,pon.txt

diff --git a/Documentation/devicetree/bindings/power/reset/qcom,pon.txt b/Documentation/devicetree/bindings/power/reset/qcom,pon.txt
new file mode 100644
index 000000000000..0dc24c9b93d5
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/reset/qcom,pon.txt
@@ -0,0 +1,45 @@
+Qualcomm PON Driver
+
+The Power On driver for Qualcomm PM8xxx is MFD supporting pwrkey and
+resin along with the Android reboot-mode.
+
+This DT node has pwrkey and resin as sub nodes.
+
+Required Properties:
+-compatible: "qcom,pm8916-pon"
+-reg: Specifies the physical address of the pon register
+
+Optional subnodes:
+-prwrkey: Specifies the subnode pwrkey and should follow the
+ qcom,pm8xxx-pwrkey.txt description.
+-resin: Specifies the subnode resin and should follow the
+ qcom,pm8xxx-pwrkey.txt description.
+
+The rest of the properties should follow the generic reboot-mode description
+found in reboot-mode.txt
+
+Example:
+
+	pon@800 {
+		compatible = "qcom,pm8916-pon";
+
+		reg = <0x800>;
+		mode-bootloader = <0x2>;
+		mode-recovery = <0x1>;
+
+		pwrkey {
+			compatible = "qcom,pm8941-pwrkey";
+			interrupts = <0x0 0x8 0 IRQ_TYPE_EDGE_BOTH>;
+			debounce = <15625>;
+			bias-pull-up;
+			linux,code = <KEY_POWER>;
+		};
+
+		resin {
+			compatible = "qcom,pm8941-resin";
+			interrupts = <0x0 0x8 1 IRQ_TYPE_EDGE_BOTH>;
+			debounce = <15625>;
+			bias-pull-up;
+			linux,code = <KEY_VOLUMEDOWN>;
+		};
+	};
-- 
2.14.4

[PATCH v2 2/5] power: reset: qcom-pon: Add Qcom PON driver

[Vinod Koul]

Add support Qualcomm PM8xxx PON which is responsible for reboot
mode support.

Co-developed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/power/reset/Kconfig    |  8 ++++
 drivers/power/reset/Makefile   |  1 +
 drivers/power/reset/qcom-pon.c | 91 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 100 insertions(+)
 create mode 100644 drivers/power/reset/qcom-pon.c

diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
index df58fc878b3e..1572b2d3ad3d 100644
--- a/drivers/power/reset/Kconfig
+++ b/drivers/power/reset/Kconfig
@@ -104,6 +104,14 @@ config POWER_RESET_MSM
 	help
 	  Power off and restart support for Qualcomm boards.
 
+config POWER_RESET_QCOM_PON
+	bool "Qualcomm power-on driver"
+	depends on ARCH_QCOM
+	depends on MFD_SPMI_PMIC
+	select REBOOT_MODE
+	help
+	  Power On support for Qualcomm boards.
+
 config POWER_RESET_OCELOT_RESET
 	bool "Microsemi Ocelot reset driver"
 	depends on MSCC_OCELOT || COMPILE_TEST
diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
index 7778c7485cf1..0aebee954ac1 100644
--- a/drivers/power/reset/Makefile
+++ b/drivers/power/reset/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o
 obj-$(CONFIG_POWER_RESET_GPIO_RESTART) += gpio-restart.o
 obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o
 obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o
+obj-$(CONFIG_POWER_RESET_QCOM_PON) += qcom-pon.o
 obj-$(CONFIG_POWER_RESET_OCELOT_RESET) += ocelot-reset.o
 obj-$(CONFIG_POWER_RESET_PIIX4_POWEROFF) += piix4-poweroff.o
 obj-$(CONFIG_POWER_RESET_LTC2952) += ltc2952-poweroff.o
diff --git a/drivers/power/reset/qcom-pon.c b/drivers/power/reset/qcom-pon.c
new file mode 100644
index 000000000000..0c4caaa7e88f
--- /dev/null
+++ b/drivers/power/reset/qcom-pon.c
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2017-18 Linaro Limited
+
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/reboot-mode.h>
+#include <linux/regmap.h>
+
+#define PON_SOFT_RB_SPARE		0x8f
+
+struct pm8916_pon {
+	struct device *dev;
+	struct regmap *regmap;
+	u32 baseaddr;
+	struct reboot_mode_driver reboot_mode;
+};
+
+static int pm8916_reboot_mode_write(struct reboot_mode_driver *reboot,
+				    unsigned int magic)
+{
+	struct pm8916_pon *pon = container_of
+			(reboot, struct pm8916_pon, reboot_mode);
+	int ret;
+
+	ret = regmap_update_bits(pon->regmap,
+				 pon->baseaddr + PON_SOFT_RB_SPARE,
+				 0xfc, magic << 2);
+	if (ret < 0)
+		dev_err(pon->dev, "update reboot mode bits failed\n");
+
+	return ret;
+}
+
+static int pm8916_pon_probe(struct platform_device *pdev)
+{
+	struct pm8916_pon *pon;
+	int error;
+
+	pon = devm_kzalloc(&pdev->dev, sizeof(*pon), GFP_KERNEL);
+	if (!pon)
+		return -ENOMEM;
+
+	pon->dev = &pdev->dev;
+
+	pon->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!pon->regmap) {
+		dev_err(&pdev->dev, "failed to locate regmap\n");
+		return -ENODEV;
+	}
+
+	error = of_property_read_u32(pdev->dev.of_node, "reg",
+				     &pon->baseaddr);
+	if (error)
+		return error;
+
+	pon->reboot_mode.dev = &pdev->dev;
+	pon->reboot_mode.write = pm8916_reboot_mode_write;
+	error = devm_reboot_mode_register(&pdev->dev, &pon->reboot_mode);
+	if (error) {
+		dev_err(&pdev->dev, "can't register reboot mode\n");
+		return error;
+	}
+
+	platform_set_drvdata(pdev, pon);
+
+	return devm_of_platform_populate(&pdev->dev);
+}
+
+static const struct of_device_id pm8916_pon_id_table[] = {
+	{ .compatible = "qcom,pm8916-pon" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, pm8916_pon_id_table);
+
+static struct platform_driver pm8916_pon_driver = {
+	.probe = pm8916_pon_probe,
+	.driver = {
+		.name = "pm8916-pon",
+		.of_match_table = of_match_ptr(pm8916_pon_id_table),
+	},
+};
+module_platform_driver(pm8916_pon_driver);
+
+MODULE_DESCRIPTION("pm8916 Power On driver");
+MODULE_LICENSE("GPL v2");
-- 
2.14.4

[PATCH v2 3/5] dt-bindings: Input: Add additional property to qcom pwrkey

[Vinod Koul]

Pwrkey and reset have similar properties so add additional
property for linux,code to use the code for sending events.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 Documentation/devicetree/bindings/input/qcom,pm8941-pwrkey.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/qcom,pm8941-pwrkey.txt b/Documentation/devicetree/bindings/input/qcom,pm8941-pwrkey.txt
index 07bf55f6e0b9..bf719396eadd 100644
--- a/Documentation/devicetree/bindings/input/qcom,pm8941-pwrkey.txt
+++ b/Documentation/devicetree/bindings/input/qcom,pm8941-pwrkey.txt
@@ -32,6 +32,14 @@ PROPERTIES
 	Definition: presence of this property indicates that the KPDPWR_N pin
 		    should be configured for pull up.
 
+- linux,code:
+	Usage: optional
+	Value type: <u32>
+	Definition: The input key-code associated with the power key.
+		    Use the linux event codes defined in
+		    include/dt-bindings/input/linux-event-codes.h
+		    When property is omitted KEY_POWER is assumed.
+
 EXAMPLE
 
 	pwrkey@800 {
@@ -40,4 +48,5 @@ EXAMPLE
 		interrupts = <0x0 0x8 0 IRQ_TYPE_EDGE_BOTH>;
 		debounce = <15625>;
 		bias-pull-up;
+		linux,code = <KEY_POWER>;
 	};
-- 
2.14.4

[PATCH v2 4/5] input: pm8941-pwrkey: Abstract register offsets and event code

[Vinod Koul]

In order to support resin thru the pwrkey driver (they are very
similar in nature) we need to abstract the handling in this driver.

First we abstract pull_up_bit and status_bit along in driver data.
The event code sent for key events is quiried from DT.

Since the device can be child of pon lookup regmap and reg from
parent if lookup fails (we are child).

Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/input/misc/pm8941-pwrkey.c | 61 ++++++++++++++++++++++++++++++--------
 1 file changed, 48 insertions(+), 13 deletions(-)

diff --git a/drivers/input/misc/pm8941-pwrkey.c b/drivers/input/misc/pm8941-pwrkey.c
index 18ad956454f1..b2c1093f7d62 100644
--- a/drivers/input/misc/pm8941-pwrkey.c
+++ b/drivers/input/misc/pm8941-pwrkey.c
@@ -20,6 +20,7 @@
 #include <linux/log2.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/reboot.h>
 #include <linux/regmap.h>
@@ -42,6 +43,10 @@
 #define PON_DBC_CTL			0x71
 #define  PON_DBC_DELAY_MASK		0x7
 
+struct pm8941_data {
+	unsigned int pull_up_bit;
+	unsigned int status_bit;
+};
 
 struct pm8941_pwrkey {
 	struct device *dev;
@@ -52,6 +57,9 @@ struct pm8941_pwrkey {
 
 	unsigned int revision;
 	struct notifier_block reboot_notifier;
+
+	unsigned int code;
+	const struct pm8941_data *data;
 };
 
 static int pm8941_reboot_notify(struct notifier_block *nb,
@@ -124,7 +132,8 @@ static irqreturn_t pm8941_pwrkey_irq(int irq, void *_data)
 	if (error)
 		return IRQ_HANDLED;
 
-	input_report_key(pwrkey->input, KEY_POWER, !!(sts & PON_KPDPWR_N_SET));
+	input_report_key(pwrkey->input, pwrkey->code,
+			 sts & pwrkey->data->status_bit);
 	input_sync(pwrkey->input);
 
 	return IRQ_HANDLED;
@@ -157,6 +166,7 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
 {
 	struct pm8941_pwrkey *pwrkey;
 	bool pull_up;
+	struct device *parent;
 	u32 req_delay;
 	int error;
 
@@ -175,12 +185,30 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	pwrkey->dev = &pdev->dev;
+	pwrkey->data = of_device_get_match_data(&pdev->dev);
 
-	pwrkey->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	parent = pdev->dev.parent;
+	pwrkey->regmap = dev_get_regmap(parent, NULL);
 	if (!pwrkey->regmap) {
-		dev_err(&pdev->dev, "failed to locate regmap\n");
-		return -ENODEV;
+		/*
+		 * we failed to get regmap for parent
+		 * Check if we are child on pon and read regmap and reg from
+		 * parent
+		 */
+		pwrkey->regmap = dev_get_regmap(parent->parent, NULL);
+		if (!pwrkey->regmap) {
+			dev_err(&pdev->dev, "failed to locate regmap\n");
+			return -ENODEV;
+		}
+
+		error = of_property_read_u32(parent->of_node,
+					     "reg", &pwrkey->baseaddr);
+	} else {
+		error = of_property_read_u32(pdev->dev.of_node, "reg",
+					     &pwrkey->baseaddr);
 	}
+	if (error)
+		return error;
 
 	pwrkey->irq = platform_get_irq(pdev, 0);
 	if (pwrkey->irq < 0) {
@@ -188,11 +216,6 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
 		return pwrkey->irq;
 	}
 
-	error = of_property_read_u32(pdev->dev.of_node, "reg",
-				     &pwrkey->baseaddr);
-	if (error)
-		return error;
-
 	error = regmap_read(pwrkey->regmap, pwrkey->baseaddr + PON_REV2,
 			    &pwrkey->revision);
 	if (error) {
@@ -200,13 +223,20 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
 		return error;
 	}
 
+	error = of_property_read_u32(pdev->dev.of_node, "linux,code",
+				     &pwrkey->code);
+	if (error) {
+		dev_info(&pdev->dev, "no linux,code assuming power%d\n", error);
+		pwrkey->code = KEY_POWER;
+	}
+
 	pwrkey->input = devm_input_allocate_device(&pdev->dev);
 	if (!pwrkey->input) {
 		dev_dbg(&pdev->dev, "unable to allocate input device\n");
 		return -ENOMEM;
 	}
 
-	input_set_capability(pwrkey->input, EV_KEY, KEY_POWER);
+	input_set_capability(pwrkey->input, EV_KEY, pwrkey->code);
 
 	pwrkey->input->name = "pm8941_pwrkey";
 	pwrkey->input->phys = "pm8941_pwrkey/input0";
@@ -225,8 +255,8 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
 
 	error = regmap_update_bits(pwrkey->regmap,
 				   pwrkey->baseaddr + PON_PULL_CTL,
-				   PON_KPDPWR_PULL_UP,
-				   pull_up ? PON_KPDPWR_PULL_UP : 0);
+				   pwrkey->data->pull_up_bit,
+				   pull_up ? pwrkey->data->pull_up_bit : 0);
 	if (error) {
 		dev_err(&pdev->dev, "failed to set pull: %d\n", error);
 		return error;
@@ -271,8 +301,13 @@ static int pm8941_pwrkey_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct pm8941_data pwrkey_data = {
+	.pull_up_bit = PON_KPDPWR_PULL_UP,
+	.status_bit = PON_KPDPWR_N_SET,
+};
+
 static const struct of_device_id pm8941_pwr_key_id_table[] = {
-	{ .compatible = "qcom,pm8941-pwrkey" },
+	{ .compatible = "qcom,pm8941-pwrkey", .data = &pwrkey_data },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, pm8941_pwr_key_id_table);
-- 
2.14.4

[PATCH v2 5/5] input: pm8941-pwrkey: Add resin entry

[Vinod Koul]

Since handling is abstracted in this driver, we need to add resin entry
in id table along with pwrkey_data.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/input/misc/pm8941-pwrkey.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/input/misc/pm8941-pwrkey.c b/drivers/input/misc/pm8941-pwrkey.c
index b2c1093f7d62..e360b1bd7415 100644
--- a/drivers/input/misc/pm8941-pwrkey.c
+++ b/drivers/input/misc/pm8941-pwrkey.c
@@ -29,6 +29,7 @@
 
 #define PON_RT_STS			0x10
 #define  PON_KPDPWR_N_SET		BIT(0)
+#define  PON_RESIN_N_SET		BIT(1)
 
 #define PON_PS_HOLD_RST_CTL		0x5a
 #define PON_PS_HOLD_RST_CTL2		0x5b
@@ -39,6 +40,7 @@
 
 #define PON_PULL_CTL			0x70
 #define  PON_KPDPWR_PULL_UP		BIT(1)
+#define  PON_RESIN_PULL_UP		BIT(0)
 
 #define PON_DBC_CTL			0x71
 #define  PON_DBC_DELAY_MASK		0x7
@@ -306,8 +308,14 @@ static const struct pm8941_data pwrkey_data = {
 	.status_bit = PON_KPDPWR_N_SET,
 };
 
+static const struct pm8941_data resin_data = {
+	.pull_up_bit = PON_RESIN_PULL_UP,
+	.status_bit = PON_RESIN_N_SET,
+};
+
 static const struct of_device_id pm8941_pwr_key_id_table[] = {
 	{ .compatible = "qcom,pm8941-pwrkey", .data = &pwrkey_data },
+	{ .compatible = "qcom,pm8941-resin", .data = &resin_data },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, pm8941_pwr_key_id_table);
-- 
2.14.4

Re: [PATCH v2 1/5] dt-bindings: power: reset: Add qcom pon binding

[Bjorn Andersson]

On Sun 24 Jun 22:09 PDT 2018, Vinod Koul wrote:

> The Power On driver for Qcom PM 8xxx is a MFD supporting pwrkey and
> resin along with the Android reboot-mode.
> Add the binding describing this.
> 
> Suggested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> Signed-off-by: Vinod Koul <vkoul@kernel.org>

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> ---
>  .../devicetree/bindings/power/reset/qcom,pon.txt   | 45 ++++++++++++++++++++++
>  1 file changed, 45 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/power/reset/qcom,pon.txt
> 
> diff --git a/Documentation/devicetree/bindings/power/reset/qcom,pon.txt b/Documentation/devicetree/bindings/power/reset/qcom,pon.txt
> new file mode 100644
> index 000000000000..0dc24c9b93d5
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/reset/qcom,pon.txt
> @@ -0,0 +1,45 @@
> +Qualcomm PON Driver
> +
> +The Power On driver for Qualcomm PM8xxx is MFD supporting pwrkey and
> +resin along with the Android reboot-mode.
> +
> +This DT node has pwrkey and resin as sub nodes.
> +
> +Required Properties:
> +-compatible: "qcom,pm8916-pon"
> +-reg: Specifies the physical address of the pon register
> +
> +Optional subnodes:
> +-prwrkey: Specifies the subnode pwrkey and should follow the
> + qcom,pm8xxx-pwrkey.txt description.
> +-resin: Specifies the subnode resin and should follow the
> + qcom,pm8xxx-pwrkey.txt description.
> +
> +The rest of the properties should follow the generic reboot-mode description
> +found in reboot-mode.txt
> +
> +Example:
> +
> +	pon@800 {
> +		compatible = "qcom,pm8916-pon";
> +
> +		reg = <0x800>;
> +		mode-bootloader = <0x2>;
> +		mode-recovery = <0x1>;
> +
> +		pwrkey {
> +			compatible = "qcom,pm8941-pwrkey";
> +			interrupts = <0x0 0x8 0 IRQ_TYPE_EDGE_BOTH>;
> +			debounce = <15625>;
> +			bias-pull-up;
> +			linux,code = <KEY_POWER>;
> +		};
> +
> +		resin {
> +			compatible = "qcom,pm8941-resin";
> +			interrupts = <0x0 0x8 1 IRQ_TYPE_EDGE_BOTH>;
> +			debounce = <15625>;
> +			bias-pull-up;
> +			linux,code = <KEY_VOLUMEDOWN>;
> +		};
> +	};
> -- 
> 2.14.4
> 

Re: [PATCH v2 4/5] input: pm8941-pwrkey: Abstract register offsets and event code

[Bjorn Andersson]

On Sun 24 Jun 22:09 PDT 2018, Vinod Koul wrote:

> In order to support resin thru the pwrkey driver (they are very
> similar in nature) we need to abstract the handling in this driver.
> 
> First we abstract pull_up_bit and status_bit along in driver data.
> The event code sent for key events is quiried from DT.
> 
> Since the device can be child of pon lookup regmap and reg from
> parent if lookup fails (we are child).
> 
> Signed-off-by: Vinod Koul <vkoul@kernel.org>
> ---
>  drivers/input/misc/pm8941-pwrkey.c | 61 ++++++++++++++++++++++++++++++--------
>  1 file changed, 48 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/input/misc/pm8941-pwrkey.c b/drivers/input/misc/pm8941-pwrkey.c
> index 18ad956454f1..b2c1093f7d62 100644
> --- a/drivers/input/misc/pm8941-pwrkey.c
> +++ b/drivers/input/misc/pm8941-pwrkey.c
> @@ -20,6 +20,7 @@
>  #include <linux/log2.h>
>  #include <linux/module.h>
>  #include <linux/of.h>
> +#include <linux/of_device.h>
>  #include <linux/platform_device.h>
>  #include <linux/reboot.h>
>  #include <linux/regmap.h>
> @@ -42,6 +43,10 @@
>  #define PON_DBC_CTL			0x71
>  #define  PON_DBC_DELAY_MASK		0x7
>  
> +struct pm8941_data {
> +	unsigned int pull_up_bit;
> +	unsigned int status_bit;
> +};
>  
>  struct pm8941_pwrkey {
>  	struct device *dev;
> @@ -52,6 +57,9 @@ struct pm8941_pwrkey {
>  
>  	unsigned int revision;
>  	struct notifier_block reboot_notifier;
> +
> +	unsigned int code;

I still would like this to be a u32, as you pass it by reference to a
function taking a u32.


Apart from that, this looks good and you have my:

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> +	const struct pm8941_data *data;
>  };
>  
>  static int pm8941_reboot_notify(struct notifier_block *nb,
> @@ -124,7 +132,8 @@ static irqreturn_t pm8941_pwrkey_irq(int irq, void *_data)
>  	if (error)
>  		return IRQ_HANDLED;
>  
> -	input_report_key(pwrkey->input, KEY_POWER, !!(sts & PON_KPDPWR_N_SET));
> +	input_report_key(pwrkey->input, pwrkey->code,
> +			 sts & pwrkey->data->status_bit);
>  	input_sync(pwrkey->input);
>  
>  	return IRQ_HANDLED;
> @@ -157,6 +166,7 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
>  {
>  	struct pm8941_pwrkey *pwrkey;
>  	bool pull_up;
> +	struct device *parent;
>  	u32 req_delay;
>  	int error;
>  
> @@ -175,12 +185,30 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
>  		return -ENOMEM;
>  
>  	pwrkey->dev = &pdev->dev;
> +	pwrkey->data = of_device_get_match_data(&pdev->dev);
>  
> -	pwrkey->regmap = dev_get_regmap(pdev->dev.parent, NULL);
> +	parent = pdev->dev.parent;
> +	pwrkey->regmap = dev_get_regmap(parent, NULL);
>  	if (!pwrkey->regmap) {
> -		dev_err(&pdev->dev, "failed to locate regmap\n");
> -		return -ENODEV;
> +		/*
> +		 * we failed to get regmap for parent
> +		 * Check if we are child on pon and read regmap and reg from
> +		 * parent
> +		 */
> +		pwrkey->regmap = dev_get_regmap(parent->parent, NULL);
> +		if (!pwrkey->regmap) {
> +			dev_err(&pdev->dev, "failed to locate regmap\n");
> +			return -ENODEV;
> +		}
> +
> +		error = of_property_read_u32(parent->of_node,
> +					     "reg", &pwrkey->baseaddr);
> +	} else {
> +		error = of_property_read_u32(pdev->dev.of_node, "reg",
> +					     &pwrkey->baseaddr);
>  	}
> +	if (error)
> +		return error;
>  
>  	pwrkey->irq = platform_get_irq(pdev, 0);
>  	if (pwrkey->irq < 0) {
> @@ -188,11 +216,6 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
>  		return pwrkey->irq;
>  	}
>  
> -	error = of_property_read_u32(pdev->dev.of_node, "reg",
> -				     &pwrkey->baseaddr);
> -	if (error)
> -		return error;
> -
>  	error = regmap_read(pwrkey->regmap, pwrkey->baseaddr + PON_REV2,
>  			    &pwrkey->revision);
>  	if (error) {
> @@ -200,13 +223,20 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
>  		return error;
>  	}
>  
> +	error = of_property_read_u32(pdev->dev.of_node, "linux,code",
> +				     &pwrkey->code);
> +	if (error) {
> +		dev_info(&pdev->dev, "no linux,code assuming power%d\n", error);
> +		pwrkey->code = KEY_POWER;
> +	}
> +
>  	pwrkey->input = devm_input_allocate_device(&pdev->dev);
>  	if (!pwrkey->input) {
>  		dev_dbg(&pdev->dev, "unable to allocate input device\n");
>  		return -ENOMEM;
>  	}
>  
> -	input_set_capability(pwrkey->input, EV_KEY, KEY_POWER);
> +	input_set_capability(pwrkey->input, EV_KEY, pwrkey->code);
>  
>  	pwrkey->input->name = "pm8941_pwrkey";
>  	pwrkey->input->phys = "pm8941_pwrkey/input0";
> @@ -225,8 +255,8 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
>  
>  	error = regmap_update_bits(pwrkey->regmap,
>  				   pwrkey->baseaddr + PON_PULL_CTL,
> -				   PON_KPDPWR_PULL_UP,
> -				   pull_up ? PON_KPDPWR_PULL_UP : 0);
> +				   pwrkey->data->pull_up_bit,
> +				   pull_up ? pwrkey->data->pull_up_bit : 0);
>  	if (error) {
>  		dev_err(&pdev->dev, "failed to set pull: %d\n", error);
>  		return error;
> @@ -271,8 +301,13 @@ static int pm8941_pwrkey_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +static const struct pm8941_data pwrkey_data = {
> +	.pull_up_bit = PON_KPDPWR_PULL_UP,
> +	.status_bit = PON_KPDPWR_N_SET,
> +};
> +
>  static const struct of_device_id pm8941_pwr_key_id_table[] = {
> -	{ .compatible = "qcom,pm8941-pwrkey" },
> +	{ .compatible = "qcom,pm8941-pwrkey", .data = &pwrkey_data },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(of, pm8941_pwr_key_id_table);
> -- 
> 2.14.4
> 

Re: [PATCH v2 4/5] input: pm8941-pwrkey: Abstract register offsets and event code

[Vinod]

On 24-06-18, 23:11, Bjorn Andersson wrote:

> >  struct pm8941_pwrkey {
> >  	struct device *dev;
> > @@ -52,6 +57,9 @@ struct pm8941_pwrkey {
> >  
> >  	unsigned int revision;
> >  	struct notifier_block reboot_notifier;
> > +
> > +	unsigned int code;
> 
> I still would like this to be a u32, as you pass it by reference to a
> function taking a u32.

somehow missed this one, will update and send v3 with your ACK

> Apart from that, this looks good and you have my:
> 
> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
-- 
~Vinod